Wireless power transmitter and wireless power transmission method
First Claim
1. A wireless power transmitter which is capable of charging a plurality of wireless power receivers, the wireless power transmitter comprising:
- a plurality of coil cells;
a main half-bridge inverter to which a main pulse signal is applied;
a plurality of sub half-bridge inverters to which a first sub pulse signal or a second sub pulse signal is applied;
a current sensor configured to monitor the current of the coil cells; and
a communications and control unit configured to control the pulse signals applied to the main half-bridge inverter and sub half-bridge inverters and communicate with the wireless power receivers,wherein the sub half-bridge inverters are respectively connected to the coil cells, and the first sub pulse signal is a phase-inverted version of the main pulse signal and the second sub pulse signal is a phase-controlled version of the main pulse signal.
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Accused Products
Abstract
A wireless power transmitter is disclosed. The wireless power transmitter, which is capable of charging a plurality of wireless power receivers, includes: a plurality of coil cells; a main half-bridge inverter to which a main pulse signal is applied; a plurality of sub half-bridge inverters to which a first sub pulse signal or second sub pulse signal is applied; a current sensor that monitors the current through the coil cells; and a communications and control unit that controls the pulse signals applied to the main half-bridge inverter and sub half-bridge inverters and that communicates with the wireless power receivers, wherein the sub half-bridge inverters may be respectively connected to the coil cells.
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Citations
13 Claims
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1. A wireless power transmitter which is capable of charging a plurality of wireless power receivers, the wireless power transmitter comprising:
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a plurality of coil cells; a main half-bridge inverter to which a main pulse signal is applied; a plurality of sub half-bridge inverters to which a first sub pulse signal or a second sub pulse signal is applied; a current sensor configured to monitor the current of the coil cells; and a communications and control unit configured to control the pulse signals applied to the main half-bridge inverter and sub half-bridge inverters and communicate with the wireless power receivers, wherein the sub half-bridge inverters are respectively connected to the coil cells, and the first sub pulse signal is a phase-inverted version of the main pulse signal and the second sub pulse signal is a phase-controlled version of the main pulse signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless power transmission method for a wireless power transmitter comprising a main half-bridge inverter and a plurality of sub half-bridge inverters, the method comprising:
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setting a selection signal to apply a second sub pulse signal to at least one of the sub half-bridge inverters; transmitting power to at least one coil cell by applying an enable signal to the at least one sub half-bridge inverter; and when the at least one coil cell receives a response from a wireless power receiver, changing the selection signal to apply a first sub pulse signal to the at least one sub half-bridge inverter, wherein the first sub pulse signal is a phase-inverted version of a main pulse signal applied to the main half-bridge inverter and the second sub pulse signal is a phase-controlled version of the main pulse signal. - View Dependent Claims (9, 10, 11, 12, 13)
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Specification